[Openstack-stable-maint] Stable check of openstack/horizon failed

Build failed. - periodic-horizon-docs-havana http://logs.openstack.org/periodic-stable/periodic-horizon-docs-havana/0b676... : SUCCESS in 4m 22s - periodic-horizon-python26-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python26-havana/1... : FAILURE in 4m 27s - periodic-horizon-python27-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python27-havana/a... : FAILURE in 4m 02s